Characterization of porous GaP by photoacoustic spectroscopy: The relation between band-gap widening and visible photoluminescence

K. Kuriyama; K. Ushiyama; K. Ohbora; Y. Miyamoto; S. Takeda

doi:10.1103/PhysRevB.58.1103

Characterization of porous GaP by photoacoustic spectroscopy: The relation between band-gap widening and visible photoluminescence

K. Kuriyama, K. Ushiyama, K. Ohbora, Y. Miyamoto, and S. Takeda

Phys. Rev. B 58, 1103 – Published 15 July 1998

Abstract

Photoacoustic and Raman spectroscopy as well as photoluminescence (PL) measurements have been used to investigate the effect of band-gap widening in porous GaP. A correlation between a blueshift of the absorption edge observed during photoacoustic measurements, accompanied by PL emissions in the blue and ultraviolet regions, and the occurance of a vibrational mode related to surface phonons is shown. Based on a simple scattering model, the structure of porous GaP is assumed to have a cylinderlike shape.

Received 9 December 1997

DOI:https://doi.org/10.1103/PhysRevB.58.1103

Authors & Affiliations

K. Kuriyama, K. Ushiyama, K. Ohbora, Y. Miyamoto, and S. Takeda

College of Engineering and Research Center of Ion Beam Technology, Hosei University, Koganei, Tokyo 184, Japan

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Vol. 58, Iss. 3 — 15 July 1998

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Physical Review B

covering condensed matter and materials physics